Electric meter.



Patented May 20. if

2 SHBETS WH. PRATT.

ELEGTRIG METER.

APPLICATION FILED MAR.13,1911.

W. H. PRATT.

ELECTRIC METER. v APPLICATION rILBD MAR. 13, 1911.

A 2 SHEETS-SHEET 21 Patented May 20, 1913 l JNYL'NTUH I/I/LLIAJHFHATR v :BY

WZTNESSE'E:

His TTURNEX il er. more, rressecnusierrrs, Asistencia 'ro GENERAL ELECTRIC CMPLNY, il. CGRPGRATN F NEW YORK.

ELECTRIC ELL-L3M il. Primm?, @ci States, resioling et oi' Mfcssw ein new .and usein Electric ltleterefq of :i speciiiceticn.

electric meters yiny invention relates to Y cheep manner, :incl l ac si the object of my invention by the improved forni of magnetic cirlii""tii'ig device", and oi the the. meter Structure.

res o?? my' invention I have artico @ity in the claims el to roede e part of ion. A .her iind'wstcnfling ot my innrr/ had to the eccomont elevation of my the cover broken l section of the tel section of the wig, e is .a perspeo scale showing' e por c circuit, the potential' u and friction compen- "ccsg in; 5 is a View of the punchc form ithe magnetic circuit; and Fig. t3 .is e perspective View showing the "on of tbe legging intl friction com ilevirw .meter conotteched e L ng portions of ineen the armature, ith its ci'ierizing coils, c :nl egisterng mechanism. t or' the cover is e. glass the 'readings of the -i l. Jiitaci'ieil to the r suitably supporting 'the civility of punchingsy is ctln cnerfitiv n km he construction of eucha nette circuit 6, n .,h is' Specification of Lettere Patent.

potentiel flux.

retienen Mey-2o, 191e.

elect time ie, ieri. sereine. (514,057.

'sitle of the magnetic circuit with its cnergiz-ing coils, is fastened to the bese 1, anal to this member are attached the damping magnet 9, the registering mechanism tend bearings 12 :incl 13 which support 'the meter ehaft.. By -this construction these portions of the meter may be readily removed and replaced Without disturbing the remainder f thereof.

Referring now to Fig. 5, it will be seen that the magnetic circuit consists of two adjacent mein polar projections 14, 14 and a main polar projection 15 facing these two projections and seperated therefrom by an cir gap 16, through which extends the meter armature, see Fig. 2. Surrounding and enerzgiz'ing'poler projections, 14, 14 is the potential winding consist-ing of two potentiel coils 141, connected so that these projections .ere of different polarities. Forming shunt finagnetic paths aboutthe armature for the f potentiel. fluxes end exterior to these projections are members or projections 17 which extend, as shown, in close proximity yto polar projections 14, le', small eirgeps 18 separating these members from the polar projections, lin addition to the shunt pat-hs furnished by these members is the shunt path for the potential flux between members 14, 14 formed by magnetic member 19,

,which is placed, esshown, between these polar projections and .sepa-rated therefrom `by non-magnetic member 20. These shunt 'paths are provided for lagging the potential ftlux in the well known manner. ging and energizing polar projection 15 is ytl'ie'series coil 151', see Figs and The Ientire series flux will pass through the air Surround.-

gap and thc armature through which it extencls to the two potential 'apelar projections zinrl the magnetic members adjacent thereto,A `but only u portion of the potential Flux will pass through this gap and the urmature,v the greater portion being; Shunted by the shunt paths previously described for lagging the l prefer to malte the meg- 'notie circuit of e plurality of single punchings of the shnhi, showin but, if it may be (l Hl, such fiinchings may be made of l pui-ts which may' be combined together to :torni a circuit such as l have flescribed io construction 'which :if

versed postum, w 1

und these members, n

feo as may be eeen byiefer:

tout of the .i tion in the Meki in iii v 411m by me :is of. screws '-4 Referring now to Fig. il? 'o azi; friction' come :eeen that these dem: shaped 'oonfluoizing momie-ei 25. These 1 wire-ye re im i o?! 2*. to Fig. 11, i5, shmxm em .im for a' better imer; C stroiotiom Between these members :is e

hcm, are 'fastened tog. eonduo'tively connect tionsr but are insixifitef their central poriorls bv means "of hi As wii be seen byv L ux shiingdezfices inicios-e 'ie the series and potentiei cos "g through the animatore, employ 'ibis particular form of cosifiic't-on that; these members Wil form :i oi :o 'motive lation to the. pote ductive relation to i whioh'shano operiaiirom. the eoope i'ilvenmonl' und shal se obvious to @hose in. the smb,

bylietiers Piment, of the Unito Ef. Siate@ iisg- -L'In an electric meter, o disk omnmee, potential ooi 'in operative reietion )loere- Wii ;h, aiiinfmaguetio circuit e'i'eieifor hav ixgxgtwo adjacent main polar prog'eoions for @mdf oeils, members seperated t'fmrefrom by eni's Wilnis oiam new and oeeire in geen?.

, ons, She miei .members forming mi' paths for fue poential .fluxes about me fm oieotrio meier comprising in comimitiion, a disk mioature, potential coils- ;md o series eo in operti've relation theref dimi-em; 50 the mein projections-` magnetic mei-ober between tno mam o.

wihl; and a maguetie eircubtherefor com plioi'ng a pluraiipy of punching having two odgaeent moin polar: promotions for the ei coils, zi. poim.' pioieetion for the seA ries; .A o i facing the potentioi poise separated f loierefrom oy a gap through which extends) 'me zii-maturo and members furmshmg shunt paths for the "potential ,fluxes aboutv thx bio-miem, e disk armature,'potential coills v and if,- soi'ies coil in operative rention them-` Wh, and moguefbio circuit comprising ap'umiity of punohings hving two .fuijaeentA polo? proieoiliome for` the potential ,1

i'aied therefom a gap 'though which extends the mmamre, and. membei's urmshmg 'shunt pailns for ziek potenti@ .uxes aboli;

he armature, f

Ato eleeti'io meie' oomprisillg in combi` naion, e disk armature, potential oeils and e. series eoil in operative relation-t-lierewith, and a magnetic circuit omprising -a pluraiity of s'ngiefpiinchings. having tvwoidl-'Ay joent main poalgpr'ojectionsi'folj he potenfy t eosyn pol'or 'projeotioxi'for the se-iieeV coil' facing the' otentiai 01ers vextending; pari; wey om# separated t'nczofrom oy v'511. 'gp ihroligh 'eh exem'isheziiotnamro and-members furnishing a e'lnmt path forfthe' potential 'Ermes 'about the mma-iure I An electric meevoompsng m combination? a disk armature, in operative relations adjacent thereto sopera-'ced' therefrom s, o, polar projeotion for the series coil 'ziewf, the potent-iai poles 'extending part. wav aerosfs ie foooe of mib poles :m sepat e'vfaoes o both poles ana Y lius by 'air gaps fom-ling shunt; Pathe for' the 'potential ux'es about the oemoturegpolarogni-,ed therefrom by which extends the armature, 'a series coil-enr imber beijw'oen 'the main' projections `also forming a shuntpiith for the-potential .l

uxes about the moutureA y, l

An siecle-1o meter comprxslng- 1'11 comblmision, a disk armature, m operative,relofk tion therewith a potential win'dig'g metio circuit therefor comprising a. 111-5 Amty of single windings-having tyvo a jacent mam polar progeotlons fozxsmd w1x1d- 

